code: def init_class_fixtures(cls):
      super(HDF5FXReaderTestCase, cls).init_class_fixtures()
      path = cls.tmpdir.getpath("fx_rates.h5")
      cls.h5_fx_reader = cls.write_h5_fx_rates(path)
  
imports: import itertools
  import pandas
  import numpy
  from zipline.data.fx import DEFAULT_FX_RATE
  from zipline.testing.predicates import assert_equal
  import zipline.testing.fixtures
label_desc: Use image node_id 1 for calling the HDF5FXReaderTestCase obj's underlying member method code with example usage: obj.init_class_fixtures(cls) without return types